NMR STUDY ON N,N' (CARBOXYMETHYL) POLYOXA-DIAZA BIS(LACTONE) MACROCYCLES

Chinese Journal of Magnetic Resonance ›› 1998, Vol. 15 ›› Issue (3): 291-294.

NMR STUDY ON N,N' (CARBOXYMETHYL) POLYOXA-DIAZA BIS(LACTONE) MACROCYCLES

Zhang Anjiang¹, Zhou Jincheng¹, Wang Shumei², Rita Delgado³

1. Department of Chemis try, Wenzhou Normal College, Wenzhou, 325003;
2. Chengdu Institute of Organic Chemistry, The Chinese Acadmey of Sciences, Chengdu, 610041;
3. Centro de Quimica Estrutural, Institut Superior Técnico, 1096 Lisboa Codex, Portugal

Received:1998-01-12 Published:1998-06-05 Online:2018-01-13

Abstract

Abstract: The solvent effect on the ¹H chemical shifts of N,N'-dicarboxymethyl macrocyclic ether-bislactones was investigated. The experiments show the ¹H chemical shifts of methylenes a、b、c in the title compounds (1-4) which increase with the solvent polarity. The instability of the compound 1 was confirmed by ¹H NMR method. The characteristics of ¹³C NMR spectra of compound 4 due to slow conformation exchange were also discussed in this paper.

Key words: Crown ether derivatives of EDTA, Macrocyclic ether-bislactone, NMR

Zhang Anjiang, Zhou Jincheng, Wang Shumei, Rita Delgado. NMR STUDY ON N,N' (CARBOXYMETHYL) POLYOXA-DIAZA BIS(LACTONE) MACROCYCLES[J]. Chinese Journal of Magnetic Resonance, 1998, 15(3): 291-294.

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NMR STUDY ON N,N' (CARBOXYMETHYL) POLYOXA-DIAZA BIS(LACTONE) MACROCYCLES

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